Rotating vane type pump



March 30, 1965 H. ERDMANN 3,175,506

ROTATING VANE TYPE PUMP Filed Sept. 27. 1961 INVENTOR H ANS EZDMANN BYfi m, r2441? ATTORNEY 5 United States Patent 3,175,506 ROTATING VANETYPE PUMP Hans Erdmann, Lindenstrasse 42, Frankfurt am Main, GermanyFiled Sept. 27, 1961, Ser. No. 141,087 Claims priority, applicationGermany, Oct. 6, 1960, T 19,089 3 Claims. (Cl. 103-136) This inventionrelates in general to new and useful improvements in pump construction,and more particularly relates to a novel vane type pump.

The faultless function and the great efficiency of a vane type pumpdepend on the accurate manufacture and free cooperation of the elementsthereof. The pump chamber has to be accurately shaped and accuratelypositioned with respect tothe bearings for the impeller shaft. In thepresent type of pump construction, this requires fine machining with arelatively high cost of production.

The primary object of this invention is to provide a vane type pumpwherein very little accurate machining is required in the casing, theparts of the pump requiring accurate machining and alignment being soconstructed whereby they may be assembled as a unit exteriorly 0f thehousing and held in the housing by means of suitable bolts whereinmachining costs for the pump are greatly reduced as compared toconventional vane type pump construction.

Another object of this invention is to provide a vane type pump whereina one-piece housing is provided with the housing having formed thereinthe usual flow passages required in a vane type pump, and the housinghaving one end open and the other end closed, and there being insertablethrough and removable through the open end of the housing a blockassembly which defines the pumping chambers and which carries thebearings for the pump shaft, as well as the vane type impeller.

Another object of this invention is to provide a novel vane type pumpwherein a block assembly is provided for defining the pumping chambersand for supporting the impeller shaft, the block assembly including acam ring having the pump chamber formed therein, and a pair of steeringdiscs having the impeller shaft bearings mounted therein, and the discs,ring and impeller being assembled as a unit by means of an alignmentring telescoped over the cam ring and projecting therebeyond andreceiving adjacent ends of the bearing carrying discs to effect therequired alignment of the three discs and cam ring.

A further object of this invention is to provide a novel vane type pumpwhich includes a one-piece housing or casing which has the usual flowpassages formed therein and which is provided with one open end and theopposite end closed, and the impeller and impeller shaft being carriedby a block assembly as a unit with the block assembly being heldtogether and in the casing by means of bolts, and the block assemblybeing sealed with respect to the casing to prevent the undesired flow offluid.

With the above and other objects in view that will hereinafter appear,the nature of the invention will be more clearly understood by referenceto the following detailed description, the appended claims and theaccompanying drawing.

In the drawing:

The single figure of the drawing is a sectional view taken through thecenter of the pump and shows the specific details of constructionthereof.

Referring now to the drawing in detail, it will be seen that there isillustrated the components of a vane type pump formed in accordance withthis invention. The vane type pump includes a casing 1 which, as isclearly evident from the drawing, is of a one-piece construction and isprovided with an open end. The casing is also Patented Mar. 30, 1965provided with suitable fluid passages therein as required in aconventional type of vane type pump.

It is to be understood that the rotor impeller 2 and the shape of thepumping chambers are of the conventional type, and therefore need not bedescribed in detail here.

The block assembly is held in alignment by means of a centering ring 10which is telescoped about the cam ring 5 and projects on opposite sidesthereof. The centering ring 10 receives the opposed ends of the internalcontrol block 3 and the external steering discs 4 to hold the discs andring 3, 4 and 5 in alignment.

The internal steering discs 3 carry a bearing 12 While the externalsteering discs 4 carry a bearing 11. The bearings 11 and 12 are inalignment and receive therein shaft portions 14 and 13, respectively, ofthe impeller shaft. Due to the fact that the discs and ring 3, 4 and 5are held in alignment, it will be readily apparent that the impellershaft is suitably rotatably journaled in the block assembly and that theimpeller 2 is suitably mounted within the pump chamber to produce thedesired pumping action. The discs and ring 3, 4 and 5 have impressedtherein the centering ring 10 so that the necessary alignment isassured.

The casing 1 is provided with the opening 16 which is of a size tosnugly receive the external steering disc 4. The block assembly is heldwithin the casing 1 by means of a plurality of circumferentially spacedbolts 17 which pass through the blocks 3, 4 and 5 and serve to clamp theblock assembly in the casing 1.

The inner end of the internal steering disc 3 is provided with asuitable compressible gasket 9 and the outer portion of the externalsteering disc 4 is provided with a peripheral sealing ring or gasket 8.When the block as sembly is slid into the casing 1, the gasket 9 iscompressed between the opposing portions of the casing 1 and theinternal steering disc 3. The compressing of the gasket 9 is limited byengagement of the internal steering disc 3 with a wall 15 of the casing1.

It is to be noted that the openings 16 have a tapered outer portion sothat the gasket 8 is gradually compressed and serves to compressivelyengage and seal the wall of the opening 16 against escape of fluidaround the external steering disc 4.

The gasket 9 serves to prevent the passage of fluid under pressure outof the pressure chamber 18 of the pump into the bearing 12. This isobvious from the drawmg.

From the foregoing description of the pump, it will be readily apparentthat the casing 1 requires very litlle machining, and that thecomponents of the pump which require machining are readily accessible sothat the machining may take place in a manner which is relativelyinexpensive. Further, since the important components of the pump whichmust be aligned are connected together in a manner wherein they may beassembled externally of the casing, it will be apparent that the problemof alignment of the pump components is solved by the formation of theblock assembly carrying the impeller and the impeller shaft. Inaddition, the movable components of the pump may be readily removed fromthe casing for the necessary inspection and repairs.

Although a single embodiment of the invention has been illustrated anddescribed, it is to be understood that minor variations may be made inthe pump structure of this invention within the spirit and scope of theinvention, as defined in the appended claims.

I claim:

1. A vane-type pump, comprising a pot-like casing with inlet and outletports, an internal and an external steering disc, a cam ring disposedtherebetween, a shaft rotatably journaled in said steering discs andextending beyond said external disc, a vane-type rotor fixedly securedto said shaft and rotatably journaled in said cam ring, a single meansto both connect and center said discs and said ring with respect to eachother thus forming an integral unlit independently mountable, said unitbeing received by 'said case; bolt means to fasten and sealing means toseal said' unit in said case, a suction chamber and a pressure chamberbeing defined'between said case and saidunit, said inlet portcommunicating through said suction chamber with the interior of said camring and said outlet port communicating through said pressure chamberwith the interior of said cam ring, and wherein said discs and said ringare defined by cylindrical outer surfaces, said surfaces all having thesame outer diameter and wherein said means to both connect and centersaid discs and said ring with respect to each other is an outer ringhaving an inner diameter equal to the outer diameter of said discs andsaid cam ring, and said outer ring having a width exceeding theW'idth'of said cam r-ing, said outer ring being impressed over saidinner'disc; said cam ring and said external disc thus securing saiddiscs and said ring with respect to each other and likewise centeringthem.

2. The pump of claim 1 wherein said block assembly includes acircumferential sealing ring engaging said cas- 4 ing open end andsealing said casing against the escape of fluid from said suctionchamber. f

3. The pump of claim 1 wherein said block assembly includes an outercircumferential sealing ring engaging said casing open end and sealingsaid casing against the escape of fluid from said suction chamber, andan inner sealing'ri-ng on said block assembly engaging said casingopposite end and sealing said blockassembly against the inflow of fluidpressurized by said vane in said pressure chamber.

7 References Cited by the Examiner UN D S AT S P E TS.

2,825,287 3/ 58 Ostwald 103-136 2,827,854 3/5 ub r 103 13s 2,856,86010/58 Roth 103,. 13s 3,012,511 12/61 Adams??? 103 136 3,065,707 11/62-:'?.-.--.7---"r:--..---

KARL J. ALBRECHT, Primary Eramimer.

1. A VANE-TYPE PUMP, COMPRISING A POT-LIKE CASING WITH INLET AND OUTLETPORTS, AN INTERNAL AND EXTERNAL STEERING DISC, A CAM RING DISPOSEDTHEREBETWEEN, A SHAFT ROTATABLY JOURNALED IN SAID STEERING DISCS ANDEXTENDING BEYOND SAID EXTERNAL DISC, A VANE-TYPE ROTOR FIXEDLY SECUREDTO SAID SHAFT AND ROTATABLY JOURNALED IN SAID CAM RING, A SINGLE MEANSTO BOTH CONNECT AND CENTER SAID DISCS AND SAID RING WITH RESPECT TO EACHOTHER THUS FORMING AN INTEGRAL UNIT INDEPENDENTLY MOUNTABLE, SAID UNITBEING RECEIVED BY SAID CASE, BOLT MEANS TO FASTEN AND SEALING MEANS TOSEAL SAID UNIT IN SAID CASE, A SUCTION CHAMBER AND A PRESSURE CHAMBERBEING DEFINED BETWEEN SAID CASE AND SAID UNIT, SAID INLET PORTCOMMUNICATING THROUGH SAID SUCTION CHAMBER WITH THE INTERIOR OF SAID CAMRING AND SAID OUTLET PORT COMMUNICATING THROUGH SAID PRESSURE CHAMBERWITH THE INTERIOR OF SAID CAM RING, AND WHEREIN SAID DISCS AND SAID RINGARE DEFINED BY CYLINDRICAL OUTER SURFACES, SAID SURFACES ALL HAVING THESAME OUTER DIAMETER AND WHEREIN SAID MEANS TO BOTH CONNECT AND CENTERSAID DISCS AND SAID